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authorEric Dumazet <edumazet@google.com>2013-06-06 08:43:22 -0700
committerDavid S. Miller <davem@davemloft.net>2013-06-11 02:51:03 -0700
commit45203a3b380cee28f570475c0d28c169f908c209 (patch)
tree9d9b00da9accbc0ea01c91c206cb86a2f9dd7609 /include/uapi
parentb41abb42bf62a85a32c41dab873220598a6ee266 (diff)
net_sched: add 64bit rate estimators
struct gnet_stats_rate_est contains u32 fields, so the bytes per second field can wrap at 34360Mbit. Add a new gnet_stats_rate_est64 structure to get 64bit bps/pps fields, and switch the kernel to use this structure natively. This structure is dumped to user space as a new attribute : TCA_STATS_RATE_EST64 Old tc command will now display the capped bps (to 34360Mbit), instead of wrapped values, and updated tc command will display correct information. Old tc command output, after patch : eric:~# tc -s -d qd sh dev lo qdisc pfifo 8001: root refcnt 2 limit 1000p Sent 80868245400 bytes 1978837 pkt (dropped 0, overlimits 0 requeues 0) rate 34360Mbit 189696pps backlog 0b 0p requeues 0 This patch carefully reorganizes "struct Qdisc" layout to get optimal performance on SMP. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi')
-rw-r--r--include/uapi/linux/gen_stats.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/uapi/linux/gen_stats.h b/include/uapi/linux/gen_stats.h
index 552c8a0a12d..6487317ea61 100644
--- a/include/uapi/linux/gen_stats.h
+++ b/include/uapi/linux/gen_stats.h
@@ -9,6 +9,7 @@ enum {
TCA_STATS_RATE_EST,
TCA_STATS_QUEUE,
TCA_STATS_APP,
+ TCA_STATS_RATE_EST64,
__TCA_STATS_MAX,
};
#define TCA_STATS_MAX (__TCA_STATS_MAX - 1)
@@ -38,6 +39,16 @@ struct gnet_stats_rate_est {
};
/**
+ * struct gnet_stats_rate_est64 - rate estimator
+ * @bps: current byte rate
+ * @pps: current packet rate
+ */
+struct gnet_stats_rate_est64 {
+ __u64 bps;
+ __u64 pps;
+};
+
+/**
* struct gnet_stats_queue - queuing statistics
* @qlen: queue length
* @backlog: backlog size of queue